Welcome to the forum. Wizard was a brand name for Western Auto stores. They were sourced from other suppliers and badged with the Wizard name. If you can post some pics of it, we can probably I.D. the builder.

I like that a lot. My boss lady collects old reel mowers. She doesn't have a western auto yet. Nice looking mower. Looks like the motor go replaced at somepoint. There is some following for old reel mowers like this.

Yea I don't know about the engine, I assume it's the original since the original owner (a ww1 veteran with a destroyed hip from shrapnel and a messed up eye) would want to do a engine swap at his age and condition. And I know my grandfather didn't do anything with it it just sat in a barn for 40 years, and with the damage the engine had and the massive amount of carbon in it if it's not the original it had a lot of use before it made it to the reel mower.